protected async override Task <RepositoryResponse <bool> > TryDeleteAsync(string id)
{
if (!await Cache.ExistsAsync(id))
{
return(new RepositoryResponse <bool>(error: "Recipe " + id + " does not exist"));
}
if (!await Cache.TryLockAsync(id))
{
return(new RepositoryResponse <bool>(error: "Recipe " + id + " is already being changed"));
}
try
{
var oldRecipe = (await FileProxy.GetTextAsync("recipes/" + id)).Text;
var key = "recipes/" + id;
await FileProxy.DeleteAsync(key);
try
{
await RecipeCache.RemoveAsync(id);
}
catch (Exception) // Rollback file
{
await RollbackFileProxyAsync(key, oldRecipe);
throw;
}
}
finally
{
await Cache.UnLockAsync(id);
}
return(new RepositoryResponse <bool>(response: true));
}
private async Task RollbackFileProxyAsync(string key, string oldRecipeJson)
{
if (string.IsNullOrEmpty(oldRecipeJson))
{
await FileProxy.DeleteAsync(key);
}
else
{
await FileProxy.PutTextAsync(key, oldRecipeJson);
}
}
